Dopamine cell degeneration induced by intraventricular administration of 6-hydroxydopamine in the rat: similarities with cell loss in parkinson's disease

Experimental Neurology
M RodríguezT González-Hernández

Abstract

In an attempt to find a convenient rat model to study cell vulnerability in Parkinson's disease, we have investigated the cell-loss profile in different midbrain dopaminergic nuclei and subnuclei of rats injected with 6-hydroxydopamine (6-OHDA) in the third ventricle. Following administration of different doses (5-1000 microgram) of 6-OHDA, motor behavior was evaluated and tyrosine hydroxylase-immunostained neurons were counted in the A8 group and different subdivisions of A9 and A10 groups. Animals developed hypokinesia, repetitive chewing movements, and catalepsia. Signs of cell degeneration were evident from the first day after injection, reaching the definitive pattern at the end of the first week. There was a similar degeneration in both brain sides, the A9 group showing the highest degree of cell-loss, followed by A8 and A10 groups. In the A9 group, the degeneration mostly affected those subgroups located in its ventral, lateral, and posterior regions. In the A10 group the degeneration mainly affected the parabrachial pigmented nucleus, the paranigral nucleus and the ventral tegmental area. This topographic pattern of degeneration is very similar to that previously described in Parkinson's disease, suggesting that this mo...Continue Reading

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Citations

Aug 3, 2007·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Chee Yeun ChungOle Isacson
Jun 12, 2012·Parkinson's Disease·Iciar Aviles-OlmosThomas Foltynie
Oct 14, 2014·BioMed Research International·Justin R SiebertDonna J Osterhout
Sep 11, 2014·Frontiers in Neuroanatomy·Domingo Afonso-OramasTomás González-Hernández
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Aug 7, 2010·Neurobiology of Disease·Domingo Afonso-OramasTomás González-Hernández
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